In VR-Zone, it's 6W difference but the PowerTune slider is set at +20%
http://vr-zone.com/articles/amd-rade.../10474-11.html
+20% for the 250W default for 6970 is 300W ceiling, so worst case is its drawing 50W more, so its anywhere from 6 - 56W lower. Wish they did a friggin chart w/o powertune on

